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Re: Loftin White 2A3 voltage high

You need to add a B+ drop resistor to get it down,bring down the K-A (cathode to Anode) of 2A3 back to 250V (per RCA spec. of 250V @60mA).

To calculate this is to take a reading on your B+ end with the total current consumption, and calculated the proper voltage drop needed in order to bring your B+ down using Ohm's law (V=IR). 100R may not be enough in your case (you need to raise it proportionately to get the appropriate voltage drop.

Another alternative ways is to get a different mains transformer that suits your need. I've been asking ISO-Tango to get custom-wound mains transformer for my LW2A3 amp projects for years and it's been very satisfying so far.

q.


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